Periimplant bone response in human-retrieved, clinically stable, successful, and functioning dental implants after a long-term loading period: A report of 17 cases from 4 to 20 years

Giovanna Iezzi, Adriano Piattelli, Carlo Mangano, Marco Degidi, Tiziano Testori, Giovanni Vantaggiato, Elisabetta Fiera, Massimo Frosecchi, Pierluigi Floris, Roberto Perroni, Lorenzo Ravera, Gerardo Gómez Moreno, Emanuele De Martinis, Vittoria Perrotti

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: This study aimed at a histologic and histomorphometric analysis of the periimplant tissues and bone-titanium interface reactions in successfully osseointegrated, clinically stable, and immobile human titanium dental implants retrieved after a long loading period. Materials and Methods: In the last 30 months (2013-2015), 21 implants, retrieved from individuals for different causes after a loading period ranging from 4 to 20 years, were sent to the Implant Retrieval Center, University of Chieti-Pescara, Italy. In 4 cases, almost all the bone had been lost during the retrieval, whereas in the remaining 17 cases, mineralized bone was still present. Results: Around the majority of the implants, mature compact bone with few marrow spaces was found. The trabecular bone, constituted by a few thin bone trabeculae, was in a periimplant location around only a few implants. A high percentage of bone-implant contact (BIC) (comprised between 32 ± 4.1% and 83 ± 2.9%) was present. In almost all implants, the space within the threads was almost completely filled by compact lamellar bone or by a thin layer of bone. Close and tight contact between bone and implant surface was observed in all specimens with no gaps or connective tissue at the interface. Conclusions: All implants appeared to be well integrated in the surrounding mineralized bone, and all of them showed adequate boneto- implant contact percentages.

Original languageEnglish
Pages (from-to)380-386
Number of pages7
JournalImplant Dentistry
Volume25
Issue number3
DOIs
Publication statusPublished - Jun 1 2016
Externally publishedYes

Keywords

  • Bone-to-implant contact
  • Histomorphometry
  • Osseointegration
  • Removed implants

ASJC Scopus subject areas

  • Oral Surgery

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